Our clients show a growing interest in energy-saving solutions for their house in Spain. The so-called Passivhaus sets the standard for savings up to 80-85% compared to traditional building! In the spanish climate, other than the north of Europe, technical solutions do not mainly aim at avoiding loss of heat during colder perios af the year; they look for cooling down the house in warmer periods as well, or even more. Soon here we will discuss some specific aspects of the Passivhaus in Spain.